中国木薯施肥研究进展

Cassava Fertilization Research in China

中国木薯施肥研究表明,氮磷钾三大营养元素的重要性排序是N>K2O>P2O5,当连作木薯时,推荐N:P2O5:K2O配比为2～4:1:2～4,随着连作年份的延长而相应提高氮钾配比,推荐中等地力的土壤施肥量为50～100kg/hm2的N和K2O,25～50kg/hm2的P2O5。同时,根据各地的土壤化学分析,结合木薯营养需求指标,选择施用Ca、Mg、S、B、Zn和Cu等中微量肥料,建议施用硫酸钾镁肥、钙镁磷肥、生物有机肥、火烧土和各种有机肥,以及把间套种作物和木薯的废茎秆还田,从而提高土壤有机质和补充中微量肥料,可适当采用植物生长调节剂,注意施用基肥和重施苗肥。

According to the conclusion of cassava research in China,the important rank for cassava nutritiona re N〉K 2 O〉P 2 O 5,it suggested that N：P 2 O 5 ：K 2 O ratio is 2～4：1：2～4 for continues cassava production,Pf ertilizer can always keep low level,but the N and K2O ratio need to be gradually increase year after year.Ther ecommendation optimum fertilizer range per year for moderate fertility soil is about 50-100 kg/hm 2 N andK 2 O,25～50 kg/hm 2 P 2 O 5.Meanwhile,Ca,Mg,S,B,Zn and Cu fertilizer could be selected applying in somer egion according to local soil condition.it needs attention to apply Sulphate of Potash Magnesia（SPM）,C alcium Magnesium Phosphate,bio-organic fertilizer,burned soil,other FYM,waste stem and leaves ofc assava and intercrop etc.to supply organic matter and micro nutrition.Moreover,suitable use Plant GrowthR egulators,try to apply basic and seeding fertilizer.